弘扬国学 · 传承文化

graptolite

英 ['ɡræptəlaɪt] 美

解释

[古生] 笔石动物
[古生] 笔石

※ 提供单词"graptolite"的中文意思、发音示范及音标对照，中英文词源、例句和用法等。

英文词源

graptolite (n.): fossilized colonial animal from the Cambrian and later, 1838, from Modern Latin graptolithus, literally "written-stone," from Greek graptos "engraved, written, painted" (verbal adjective of graphein; see -graphy) + lithos "stone" (see litho-). So called because the fossils resemble pens. Related: Graptolitic.

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例句和用法

1. These provide base for the correct measurement and valuing of graptolite reflectivity.: 从而为笔石反射率的正确测定和取值奠定了基础.

2. The black graptolite shale facies indicate a deep - water, half enclosed and anoxic sedimentary environment.: 中奥陶世黑色的笔石页岩为典型的半封闭缺氧的深水沉积环境,反映了海水逐步加深,水体也变得相对宁静.